Add 'find' command to commander for searching memory.
Add 'find' command to commander for searching memory.

pyocd/pyOCD,flit/pyOCD,mbedmicro/pyOCD,mesheven/pyOCD,mbedmicro/pyOCD,pyocd/pyOCD,mesheven/pyOCD,mbedmicro/pyOCD,flit/pyOCD,mesheven/pyOCD